Warning: The energy needed to increase
the temperature of 1 g
of water by 1 °C varies depending on the starting temperature. and is in any
case difficult to measure precisely. In this page we use the Thermochemical calorie = 4.184 joules. This value is used to calculate the Thermochemical Btu

Quick reference table

Btu (Th)

Kilocalories (Th)

1

0.251995761

2

0.503991522

3

0.755987283

4

1.007983044

5

1.259978805

6

1.511974566

7

1.763970327

8

2.015966088

9

2.267961849

10

2.51995761

15

3.779936415

20

5.03991522

25

6.299894025

30

7.55987283

35

8.819851635

40

10.07983044

45

11.339809245

50

12.59978805

60

15.11974566

70

17.63970327

80

20.15966088

90

22.67961849

100

25.1995761

150

37.79936415

200

50.3991522

250

62.99894025

500

125.9978805

1000

251.995761

Kilocalories (Th)

Btu (Th)

1

3.96832072107753

2

7.93664144215505

3

11.9049621632326

4

15.8732828843101

5

19.8416036053876

6

23.8099243264652

7

27.7782450475427

8

31.7465657686202

9

35.7148864896977

10

39.6832072107753

15

59.5248108161629

20

79.3664144215505

25

99.2080180269382

30

119.049621632326

35

138.891225237713

40

158.732828843101

45

178.574432448489

50

198.416036053876

60

238.099243264652

70

277.782450475427

80

317.465657686202

90

357.148864896977

100

396.832072107753

150

595.248108161629

200

793.664144215505

250

992.080180269382

500

1984.16036053876

1000

3968.32072107753

Note: The calculations may contain involuntary errors. You only may use the results under your own
responsibility. We are not responsible from the use of the results obtained.